We analyze the collective spin noise in interacting spin systems. General expressions are derived for the short-time behavior of spin systems with general spin-spin interactions, and we suggest optimum experimental conditions for the detection of spin squeezing. For Ising models with site-dependent ne...
We study entanglement and spin squeezing in the ground state of three qubits interacting via the transverse Ising model. We give analytical results for the entanglement and spin squeezing, and a quantitative relation between the concurrence, quantifying the entanglement of two spins, and the spin ...
in Spin squeezing, connected to the quantum correlations between the spins, is one of the most successful approaches to detect the multipartite entanglement in many-spin systems40,41,42,43,44,45. Because of important applications, spin squeezing has attracted significant attention as a subject of...
We show that by displacing two optical lattices with respect to each other, we may produce interactions similar to the ones describing ferro-magnetism in condensed matter physics. We also show that particularly simple choices of the interaction lead to spin-squeezing, which may be used to improve...
We first present various definitions of spin squeezing parameters, explain their origin and properties for typical states, and then discuss spin-squeezed states produced with the Ising and the nonlinear twisting Hamiltonians. Afterwards, we explain correlations and entanglement in spin-squeezed states, ...
We study entanglement and spin squeezing in the ground state of three qubits interacting via the transverse Ising model. We give analytical results for the entanglement and spin squeezing, and a quantitative relation between the concurrence, quantifying the entanglement of two spins, and the spin ...
states. It is shown that the mean spin direction is determined by the superposition coefficients and the relative phase; while the length of mean spin and the spin squeezing parameter are only determined by the superposition coefficients. It is also shown that there is squeezing in the direction...
We also present finite-size corrections to the renormalization of the spin's coherence, showing that squeezing effects are also absent to leading order in... Chin,A. W. - 《Physical Review B Condensed Matter》 被引量: 11发表: 2007年 Dissipative transverse-field Ising model: steady-state corr...
We study the transverse-field Ising model with infinite-range coupling and spontaneous emission on every site. We find that there is spin squeezing in steady state due to the presence of the transverse field. This means that there is still entanglement, despite the decoherence from spontaneous ...
Conditional spin squeezing can be achieved by continuous quantum-nondemolition measurement of an atomic sample. We show that simultaneous feedback of the m... L. K. THOMSEN,H. M. WISEMAN,S. MANCINI,... - Proceedings of the 6th International Conference on Quantum Communication, Measurement and ...